ISHS Acta Horticulturae 229: Symposium on Biological Aspects of Energy Saving in Protected Cultivation
THERMAL SCREEN TRIAL WITH TOMATO, PEPPER AND EGG-PLANT |
| Authors: | A. Duranti, G. Barbieri, A.M.R. Lanza |
| Abstract:
Research was carried out in Campania (Southern Italy) during the winter of 1986 in order to evaluate the yield response of tomato, pepper and egg-plant to two withdrawable screens (PVC and Fibertex), which covered the crops from dusk to dawn. The glasshouse was divided into nine compartments of which three were covered with 0.15mm thick clear PVC film, three with white Fibertex (acryl-polypropylene) and three were unscreened controls. The minimum air-temperature were 0.6–2°C and 0.4–1°C higher under Fibertex and PVC screens respectively than the air temperature of the unscreened control. The Fibertex sheet ensured lower maximum R.H. than PVC. The total and the early yields of the three crops were higher from the screens than from the control with no screen: +20.2% for tomato, +27% for egg-plant and +52.8% for pepper for total yield. A difference between the two screens was noted only in the case of pepper: the use of PVC gave significantly lower performance. In the control plots, plants had a lower number of fruits. | |
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